maxon

4-Q-DC Servoamplifier Summarymaxon special program0 - 30 Watt10 - 250 Watt4-Q-DC Servoamplifier LSC− Five operating modes: IxR compensation,voltage control, encoder speed control, DCtacho speed control, current control− No motor choke necessary− Thanks to linear power stage, practically noelectrical interference− Stand alone – easy start-up procedure− Operating voltage V CC12 - 30 VDC− Max. output current I max 2 A, I cont = I max4-Q-DC Servoamplifier ADS Standard− Four operating modes: IxR compensation,encoder speed control, DC tacho speedcontrol , current control− Pulse width modulated power stage− Built-in motor choke− Module housing with screw type terminalblock or eurocard format− Operating voltage V CC12 - 50 VDC− Max. output current I maxup to 10 A− Continuous output current I cont up to 5 A80 - 500 Watt4-Q-DC Servoamplifier ADS Power− Four operating modes: IxR compensation,encoder speed control, DC tacho speedcontrol , current control− Pulse width modulated power stage− Built-in motor choke− Module housing with screw type terminalblock or eurocard format− Operating voltage V CC12 - 50 VDC− Max. output current I maxup to 20 A− Continuous output current I cont up to 10 AChoosing the servoamplifierBasically the power stages are controlled linearly(0–30 watts) or pulsed (10–500 watts). The argumentsfor one or the other technology are shownon page 34/35.Choice of motor typeSelect the motor or motor-gear type according tothe required power output. See “Selection guide”and possibly items page 203.Choice of motor windingEvery controller has an optimal operating rangeas well as absolute limits. The motor windingshould be selected such that the controller is notoperated continuously at the limits of its capability.1. Take the voltage drop through the servoamplifierinto consideration (5 Volt for LSC,2 Volt for ADS).2. To be sure calculate the load torque10% higher.3. Calculate the theoretical speedconstant k n,th .Choice of power supply unitAny power supply, which fulfills the requests ofthe servoamplifiers, can be used:− Output voltageV CCmin ; V CCmax− Remaining ripple 5%− Output currentcontinuous I contmax. I max (0.1 s)Consider− Voltage and current must correspond to thedesired operating point of the motor.− The power supply must be able to buffer theback-fed energy from brake operation e.g. in acondenser. With electronically stabilized powersupply units it is to ensure that the overcurrentprotection responds in no operating condition.k n,th = Theoretical speed constantk n = Speed constant[rpm/V] (line 13)n L = Output speed, loaded [rpm]n/M = Speed/torque gradient[rpm/mNm] (line 14)M L = Required output torque [mNm]U = Max. voltage supplied by themaxon motor control [V]4. Choose the winding with k n > k n,th(see motor data, pages 48–134, line 13)370 maxon special program May 2012 edition / subject to change